Guy-clamp.



H. W. PLEISTER.

GUY CLAMP.

APPLICATION FILED MAY I8. 19.

Iatented Dec.l7, 1918.

nnrrnn srm*s PATENT ormes.

HENRY W. PLEISTER, WESTFIELD, NEW J EBSEY, ASSIGNOR'TO HENRY B. NEWIILL; HENRY B. NEWII ALL, JR., EXECUIOR OF SAID HENRY B. NEWHALL, DECEASED.

GUY-CLAMP. 7

Application filed May 18, 1917. Serial No. 169,601.

' T0 all whom z't may concernk Be it known that I, HENRY W. PIISIER, a citizen of theUi1ited States, residing at Westfield, inthe county of Union and State of New Jersey, have invented certain neW and useful Improvements in Guy-ClampS, of which the following is a specification, taken in connection with the accompanying drawing.

My invention relates to guy clamps and more particularly to such guy clamps as are used in telephone and telegraph installations. The advantages of my invention will be more fully hereinafter pointed out in the specification and claims.

In the accompanying drawing, in which the saine reference numerals refer to the similar parts in the several figures- Figure 1 is a plan view of my guy clamp showing the mcssenger located in the guy clamp and broken away;

7 Fig. 2 is a longitudinal, vertical section snbstantially on the line 22 of Fig. 1;

Fig. 3 is a longitudinal, vertical section s'ubstantially on the line 33 cf Fig. 1;

Fig. 4: is a transverse, vertical section on the line 4-4 of Fig. 3; and Fig. 5 is a diagrammatic view of the wave line in the grooves of the guy clamp.

The common practice of running messenger strands between poles, up to a comparatively recent date, was to take the end Which would not reach to the next polo, known among the linemen as the dead end, and

wrap it around the last pole reached. This caused a loss of from approximately ten to one hundred feet of most expensive wire messcnger strand.

In the new practice the messenger strand is continued without wrapping or other interruption by means of connections should the end of messenger strand not extend to the next pole. The free end of the messenger strand is bent back on itself forming an eye (not shown) which engages the end of the neXt stretch of. messenger.

The end of the messenger Which is bent back is securcd by means of several guy clamps to -obtain the necessary holding capacity. The slipping of the guy clamps is very dangerous for the reason that it may occur when a lineman is in a boatswains scat between poles causing loss of life. Or if the guy clamp is used to brace a pole the guy clamp mi ght slip when the pole is under heavy wind or sleet pressure permitting the polo and Wires to fall. For these reasons a plurality of ordinary guy,clamps have to be used for each connection which necessitates an additional outlay and additional labor in installing them.

Ordinarily tvvo, three or more standard guy clamps are used on eachrinterlocking end of the strand. These clamps are com- ,p.ratively expensive and it takes time and labor to properly position them. The total holding capacity of these guy clamps is the combined compression obtained by the bolts in each of the scparate guy clamps.

By my invention I make one guy clamp of substantially the same length of an ordinary guy clamp, do the work of two such guy clamps. I have shown, for example, in my drawings a gu clamp 1 formed of the duplicate members 2 and 3. The member 2 is provided with two or more unthreaded bosses 4:, 5 and 6. Between these unthreaded bosses 4, 5 and 6, I mounted threaded bosses 7, 8 and 9. The member 3 is provided with two or more unthreaded bosses 14: and 15. Alternating with these unthreaded bosses I mount threaded bosses 10, 12 and 13.

The two memberS 2 and 3 are identical and by reversing them end to end a threaded boss Will position itself opposite each unthreaded boss of the opposite member.

In the coperating bosses are mounted the sets of bolts 16, 16. It Will be noted that the threaded'bosses corne between the heads 17 of the bolts 16. This insures that suificient espace will be left between the diflerent heads .17, 17 of the bolts 16, 16 t0 permit a very large wrench to be used, such as commonly used by linemen in the field.

The average pressure on each bolt, which is required under service conditions, is approximately 16,000 pounds tensile strength. It is, therefore, obvious that a very large wrench is required to coperate With the heads 17, 17 of the bolts. The bolt ordinarily used for this heavy work is a -g bolt. Of course, where a larger bolt is used greater pressure than 16,000 pounds would bc developed by each bolt, while a lighter bolt would not exert less ten sile strength.

It will be noted that the screwthreaded bosses, not only space the bolts from each other, but also avoid the use of nuts which Would lie between the bolt heads and prevent the proper manipulation of the wrench. The

Specification of Letters Patent. 'Ptented Dec. 17, 1918.

material.

' It Will also be noted that the bolt heads 17 lie on opposite sicles of the guy clamp,

so that in a clamp using six bolts, such as that shown, three of the heads 17 can be easily operated fronr one side of the guy clamp with a large wrench, While the re maining three can be operated by the same wrench from the other side.

If it were attempted to simply lengthen one of the ordinary guy clamps and obtain therein essentially the same grip as I obtain in my guy clamp, the length' ci. the members 2 and 3 Would have to be at least double the length of the present clamp, which is noW in use. This would accordingly double the weight and cost of the clamp, besides placing an additional and unnecessary load on the messenger. This is due to the fact that the heads of the bolts must be spaced far enOugh apart t0 permit manipulation by the large wrench required for this Work.

In my guy clamp I locate six bolts in prac-* tically the same length guy clamp as is now used for three bolts, and thereby save cost *of material, and, further, obtain a clamp having the same holding capacity as two ordinary standard guy clamps. The increased holding capacity is due tothe combined compression of the same number of bolts ordinarily used in tWo clamps, making it equivalent in holding capacity to tWo regular clamps Which would ordinarily occupy at least twice the space, and require additional labor, in mounting them. Obtaining a short powerful guy clamp is also of great value for the dead end of the messenger 18 is often short.

Each of the members 2 and 8 is provided with grooves 19, 19 which have a wave line so that there are no rights or lefts in the members 2 and 3, thus reclucing the cost of the pattern equipment, the number ofdifierent parts to be made for assembling the clatmp, and a corresponding reductionin the cost of stock to be carried in order to turn the clamps out.

I have shown diagrannnatically in Fig. 5, such a wave line which is in the cable grooves 19, 19. The neutral point is 20 and is in the center of the clamp 1. It is obvious that with such a wave line my guy clamp has no rights or lefts. This insures that the number of parts necessary for assembling one of my guy clamps is reduced for -both sides are idcntical.

VVhile I have shown six bolts, three on a side, it is of course to be understood that any desired number of bolts may'be used. Thus for example, I could use three bolts and make a clamp of equal holding capacity in half the length of the present form of three bolt clamp.

Having thus described this invention in connection with an illustrative embodiment thereof, to the details of which I do not desire to be limited, What is claimed as new and what is desired to secure by Letters Patent is set forth in the appended claims.

VVhat I daim as my invention and desire to secure by Letters Patent is l. Aguy clamp formed of two clamping members having alternate threaded and unthreaded bosses and bolts to coperate with the bosses.

2. A guy clamp formed of two duplicate clamping members having alternate thread ed and unthreaded bosses thereby avoiding rights and lefts,and bolts to coperate with the bosses.

3. Aguy clamp formed of two clamping members having alternate threaded and unthreaded bosses, the threaded bosses acting as sjpacers between the heads of the bolts to permit their manipulation and bolts to cooperate with the bosses.

4. A guy clamp composed of tWo duplicate members provided with alternating threaded and unthreaded bosses so placed that whenreversed end to end and placed one upon the other each threaded boss Will lie axially opposite an unthreaded boss.

5. A guy clamp composed of two duplicate members provided With alternating threaded and unthreaded bosses s0 placed that When reversed end to end and placed one upon the other each threaded boss Will lie axially opposite an unthreaded boss, the unthreaded bosses being elevated above the threaded bosses to permit clearance between bolt heads for a wrench.

HENRY W. PLEISTER.

VVitnesses A. M. WILLIAMS, M. R. RYAN.

Copies of this patent may be obtained for five cents each, by addressing the Commssoner of latents,

Washington, 1). G. 

